Although I don’t advocate undercutting the profits of an invention, This one is so easy that I had to share.

While I was shopping in my local 99c store, I noticed some packages of 5 1/2” non slip Gripper Pads. (same material as non slip router pads) and thought, hmmmm and bought 2pkgs (4 pads to ea. pk).

When I got home, I took some scrap 3/4” birch ply and clamped it to my drill press. Using a 3” hole saw w/o the pilot drill, I cut 4 discks. I sanded the hole saw cuts smooth and took down some contact cement. I glued a pad to each side of the four discs and trimmed off the excess gripper pad and VIOLA! Bench Doughnuts. Four for 2 bucks.